A new basal actinopterygian fish from the Late Ladinian of Monte San Giorgio (Canton Ticino, Switzerland)
Articolo
Data di Pubblicazione:
2013
Citazione:
A new basal actinopterygian fish from the Late Ladinian of Monte San Giorgio (Canton Ticino, Switzerland) / C. Lombardo. - In: SWISS JOURNAL OF GEOSCIENCES. - ISSN 1661-8726. - 106:2(2013 Nov), pp. 219-230. [10.1007/s00015-013-0125-9]
Abstract:
A new taxon of Late Ladinian basal actinopterygian is described on the basis of a single specimen from the Meride Limestone (Kalkschieferzone) of Meride (Canton Ticino, Switzerland). The species is characterized by a single plate-like branchiostegal, a suboperculum larger than the operculum, a maxillary fixed and posteriorly expanded, a large and rectangular dermopterotic and a large triangular dermosphenotic; the scales are rectangular to rhomboidal, the lepidotrichia of median fins are segmented from their base and the caudal fin shows epaxial rays. These features resemble the condition of the Redfieldiiformes, a freshwater fish group, whose presence in Europe is still controversial, owing to poor preservation of specimens found so far.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
actinopterygians; middle triassic; Monte San Giorgio Lagerstatte; taxonomy; palaeobiogeography
Elenco autori:
C. Lombardo
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